Specifications: The APV414E is a Normally Closed (1 Form B, SPST-NC) PhotoMOS SSR in a DIP-6 package. It is rated for 120mA at 400V AC/DC, featuring a 20惟 on-state resistance. It provides 5000Vrms isolation and has unique switching characteristics: a fast 20渭s turn-on (to open the circuit) and a 500渭s turn-off (to close the circuit). It operates from -40掳C to 85掳C with a 1.2-1.4VDC control input. Application Scenarios: Designed specifically for fail-safe applications where the load must be powered by default. Common uses include safety interlock circuits, emergency stop (E-stop) systems, alarm circuit triggers that are normally active, watchdog timer outputs, and any control system requiring a guaranteed conductive path that is only interrupted when the control signal is actively applied, ensuring functional safety in industrial and medical environments.